A linkage map for brown trout (salmo trutta): chromosome homeologies and comparative genome organization with other salmonid fish
We report on the construction of a linkage map for brown trout (Salmo trutta) and its comparison with those of other tetraploid-derivative fish in the family Salmonidae, including Atlantic salmon (Salmo salar), rainbow trout (Oncorhynchus mykiss), and Arctic char (Salvelinus alpinus). Overall, we id...
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Format: | Article in Journal/Newspaper |
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Genetics Society of America
2005
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Online Access: | http://hdl.handle.net/10379/9210 https://doi.org/10.1534/genetics.105.048330 |
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ftnuigalway:oai:aran.library.nuigalway.ie/:10379/9210 2023-06-11T04:09:11+02:00 A linkage map for brown trout (salmo trutta): chromosome homeologies and comparative genome organization with other salmonid fish Gharbi, K. 2005-12-15 http://hdl.handle.net/10379/9210 https://doi.org/10.1534/genetics.105.048330 unknown Genetics Society of America Genetics Gharbi, K. (2005). A linkage map for brown trout (salmo trutta): chromosome homeologies and comparative genome organization with other salmonid fish. Genetics 172 (4), 2405-2419 0016-6731 http://hdl.handle.net/10379/9210 doi:10.1534/genetics.105.048330 Attribution-NonCommercial-NoDerivs 3.0 Ireland https://creativecommons.org/licenses/by-nc-nd/3.0/ie/ rainbow-trout oncorhynchus-mykiss atlantic salmon recombination rates segregation loci pseudolinkage salvelinus evolution patterns Article 2005 ftnuigalway https://doi.org/10.1534/genetics.105.048330 2023-05-28T18:04:41Z We report on the construction of a linkage map for brown trout (Salmo trutta) and its comparison with those of other tetraploid-derivative fish in the family Salmonidae, including Atlantic salmon (Salmo salar), rainbow trout (Oncorhynchus mykiss), and Arctic char (Salvelinus alpinus). Overall, we identified 37 linkage groups (2n = 80) from the analysis of 288 microsatellite polymorphisms, 13 allozyme markers, and phenotypic sex in four backcross families. Additionally, we used gene-centromere analysis to approximate the position of the centromere for 20 linkage groups and thus relate linkage arrangements to the physical morphology of chromosomes. Sex-specific maps derived from Multiple parents were estimated to cover 346.4 and 912.5 cM of the male and female genomes, respectively. As previously observed in other salmonids, recombination rates showed large sex differences (average female-to-male ratio was 6.4), with male crossovers generally localized toward the distal end of linkage groups. Putative homeologous regions inherited from the salmonid tetraploid ancestor were identified for 10 pairs of linkage groups, including five chromosomes showing evidence of residual tetrasomy (pseudolinkage). Map alignments with orthologous regions in Atlantic salmon, rainbow trout, and Arctic char also revealed extensive conservation of syntenic blocks across species, which was generally consistent with chromosome divergence through Robertsonian translocations. Article in Journal/Newspaper Arctic Atlantic salmon Salmo salar Salvelinus alpinus National University of Ireland (NUI), Galway: ARAN Arctic Genetics 172 4 2405 2419 |
institution |
Open Polar |
collection |
National University of Ireland (NUI), Galway: ARAN |
op_collection_id |
ftnuigalway |
language |
unknown |
topic |
rainbow-trout oncorhynchus-mykiss atlantic salmon recombination rates segregation loci pseudolinkage salvelinus evolution patterns |
spellingShingle |
rainbow-trout oncorhynchus-mykiss atlantic salmon recombination rates segregation loci pseudolinkage salvelinus evolution patterns Gharbi, K. A linkage map for brown trout (salmo trutta): chromosome homeologies and comparative genome organization with other salmonid fish |
topic_facet |
rainbow-trout oncorhynchus-mykiss atlantic salmon recombination rates segregation loci pseudolinkage salvelinus evolution patterns |
description |
We report on the construction of a linkage map for brown trout (Salmo trutta) and its comparison with those of other tetraploid-derivative fish in the family Salmonidae, including Atlantic salmon (Salmo salar), rainbow trout (Oncorhynchus mykiss), and Arctic char (Salvelinus alpinus). Overall, we identified 37 linkage groups (2n = 80) from the analysis of 288 microsatellite polymorphisms, 13 allozyme markers, and phenotypic sex in four backcross families. Additionally, we used gene-centromere analysis to approximate the position of the centromere for 20 linkage groups and thus relate linkage arrangements to the physical morphology of chromosomes. Sex-specific maps derived from Multiple parents were estimated to cover 346.4 and 912.5 cM of the male and female genomes, respectively. As previously observed in other salmonids, recombination rates showed large sex differences (average female-to-male ratio was 6.4), with male crossovers generally localized toward the distal end of linkage groups. Putative homeologous regions inherited from the salmonid tetraploid ancestor were identified for 10 pairs of linkage groups, including five chromosomes showing evidence of residual tetrasomy (pseudolinkage). Map alignments with orthologous regions in Atlantic salmon, rainbow trout, and Arctic char also revealed extensive conservation of syntenic blocks across species, which was generally consistent with chromosome divergence through Robertsonian translocations. |
format |
Article in Journal/Newspaper |
author |
Gharbi, K. |
author_facet |
Gharbi, K. |
author_sort |
Gharbi, K. |
title |
A linkage map for brown trout (salmo trutta): chromosome homeologies and comparative genome organization with other salmonid fish |
title_short |
A linkage map for brown trout (salmo trutta): chromosome homeologies and comparative genome organization with other salmonid fish |
title_full |
A linkage map for brown trout (salmo trutta): chromosome homeologies and comparative genome organization with other salmonid fish |
title_fullStr |
A linkage map for brown trout (salmo trutta): chromosome homeologies and comparative genome organization with other salmonid fish |
title_full_unstemmed |
A linkage map for brown trout (salmo trutta): chromosome homeologies and comparative genome organization with other salmonid fish |
title_sort |
linkage map for brown trout (salmo trutta): chromosome homeologies and comparative genome organization with other salmonid fish |
publisher |
Genetics Society of America |
publishDate |
2005 |
url |
http://hdl.handle.net/10379/9210 https://doi.org/10.1534/genetics.105.048330 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Atlantic salmon Salmo salar Salvelinus alpinus |
genre_facet |
Arctic Atlantic salmon Salmo salar Salvelinus alpinus |
op_relation |
Genetics Gharbi, K. (2005). A linkage map for brown trout (salmo trutta): chromosome homeologies and comparative genome organization with other salmonid fish. Genetics 172 (4), 2405-2419 0016-6731 http://hdl.handle.net/10379/9210 doi:10.1534/genetics.105.048330 |
op_rights |
Attribution-NonCommercial-NoDerivs 3.0 Ireland https://creativecommons.org/licenses/by-nc-nd/3.0/ie/ |
op_doi |
https://doi.org/10.1534/genetics.105.048330 |
container_title |
Genetics |
container_volume |
172 |
container_issue |
4 |
container_start_page |
2405 |
op_container_end_page |
2419 |
_version_ |
1768382951283752960 |